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公开(公告)号：US1898032A
公开(公告)日：1933-02-21
申请号：US49989830
申请日：1930-12-04
Applicant: GEN THEATRES EQUIPMENT INC
Inventor： CLOUD RAYMOND T
IPC: H01J63/00
CPC classification number: H01J63/00
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公开(公告)号：US1905153A
公开(公告)日：1933-04-25
申请号：US42360030
申请日：1930-01-27
Applicant: GEN THEATRES EQUIPMENT INC
Inventor： CLOUD RAYMOND T
IPC: H01J61/98
CPC classification number: H01J61/98
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